Radioamplifier and support



Jan. 5 1926. 1,568,467

E. J. PACKER RADIO AMPLIFIER AND SUPPORT Filed Jan. 24,, 1925 2 Sheets-Sheet 1 MvE/vrw? w/r/vsss:

i E JP 7% fi /ww. 2%,

1 ITTOEM-KSL Jan. 5 1926. 1,568,467

' E. J. PACK'ER RADIO AMPLIFIER AND SUPPORT Filed Jan. 24, 1925 2 Sheets-Sheet 2 I M VE/YTW? IV/ 7/1 55 8 zira 7. F'ac/Eer F/a J",

ASSIGNOR TO THE OGLEY QEATION 03 P NNSYL lining sound-dischaige-mouth of gradueizpencling cross section, the laminated i thereof being preferably concavely *eti toward the sound-discharge openin loci; section (1 of the intermediate part of the iunpliiiei' is hollowed out to form here and Supports which he inhe ent cyni channel the entrance of is e J'Eull clear, and exact clesci'i ion which is a circular opening aligning with erence being hnci to the eccoinpenying airewthe sountndischsi'ge end of the, metal horn, ings, which form of this spec'ficethe enit of Which is of rectangular tioni shape I ehly about square) and of My invention ieietes to c 1 suhstentie greater cross-sectional area tsiningiai radio recei'ci? nticu: n the c css-sectionel area of the entrance ieily to the CGilS'ClfifiiiiQm the channel. The metal horn is pro- 3 pension of the with an annular flange 0 which is with the 'ecui'ed to the face of the block surrounding A preferred emhoii'iment circular entrance to its sounci-conveying is shown in the accompany The metal horn c is preferably Which: 21;, between its ends, by means of an Fig, 1 is e perspective V *ecurecl to the outside 01 the secloohing toward the k011i. the intermediate block.

' is e sectionei View section. 6 of the intermediate part amplifier is hollowed out from one 1 form a concave internal Wall which expands toward the rectangular-shaped exit the sound-conveying channel in sec- 1 top and bottom Walls of the ying channel in section 6 use The exit mouth of the nveying channel in section :2 is of shape, its shorter vertical height o I go icling to the height of the exit end pliiier supporting means, oi c ennel in section (Z, so that the cross- The cnhinet a, may he of en sectional area of its sound discharge open- To all in}: am it may concern Be it known that EL- citizen of the United S Philecleiphia county of 5 State of Pennsylvania, he.

and useful Improvement in up lly struction. The cabinet somewhat greater than the cross-scc shelf 01 compartment "to tionel ei'eu of the sound-discharge opening eii the eieine of the section Zn Thereby the sound conveying cei. c tunes to expanoi in its course, speehee c "a 1 s" 1 enci t en seciions d and c are made separatemen end 7 as a manufacturing expedient to coring them out. They may he one niece if desired.

opening encl sound-exit lgjrigll'i', leg d of the L-shapecl 1 on the same face of the un, g and the metal horn c extends-from etc sound-inlet opening above and to the ciirection of extension of the leg" 6 of the L-shapecl block. T he extends from the side of the c of the L-shaneci block, its at right angles to the direcon of the axis of inc metal iy inciepenoen The nrnniii namely: zin 3. o emetei" pcogiessive soundfeceivnig enci end; an inteemediete 09 ehly l i-shcpecl, which sireci -1 two sectio' out to form e sonnet-coin] greclueliy expencling souncl- T Win It is found that the vibrations produced by the amplifier are transmitted to the cabi= net and thence to the radio apparatus, re sulting in imperfect functioning of certain of its elements. I find that this objectionable transmission of vibrations is avoided bysupporting the amplifier as shown on the .drawings.

The cabinet is provided, along the front. with a beam m and along the rear with a beam at. 'The sections d and e of the intermediate channelled block rest on rubber cushions 0 or other elastic supports, which in turn rest on rear beam n. A screw go on tends through the beam 1t and each cushion into the block (Z, c. The lower wall of the horn f alsorests, near its front edge, on similar rubber cushions 0,, WhlCl'l are secured between the beam m and the lower wall of the horn by means of screws 79.

These rubber cushions are, in efi'ect, vibration, insulators and the amplifier a floating amplifier.

The amplifier does not require any addi- 2 tional support after the cabinet is set in place for use; but for purposes of transportation, it is safer to securethe rear face of section (I of the intermediate block to an upright 7* secured to the rear of the cabinet, and (in order to avoid transmission of vibrations) separate the upright from block section e bymeans of rubber cushions 0 similar to cushions 0 and 0' and screws 2 similar metal horn, the other section being hollowed out to form a chamber having a curved wall overhung and underhung by fiat walls and providing a sound-entrance opening communicating with the sound-exit opening of the first section and a sound-exit opening communicating with the sound-entrance opening of the wooden horn.

2. The combination with a cabinet adapted to contain a radio-receiving outfit; of a sound amplifier comprising a block having a member extending lengthwise of the cabinet and an upright member and hollowed out to form a sound conduit extending through both members and having a sound entrance opening inthe side of the upright member and a sound exit opening in the front of the lengthwise extending member, a soundreceiving horn supported by said block and extending above and along its lengthwise extending member and communicating with said sound entrance opening, and a sound-- discharge horn communicating with said sound exit opening and extending forwardly across the cabinet, andmeans on the cabinet supportingsaid block and sound-discharge horn. 4

. 3. The combination with a sound amplifier comprising a metal horn, anintermediatc channelled wooden block, and a wooden horn; of a cabinet adapted to contain a radio-receiving outfit and comprising am plilier supporting beams at front and rear, said block overlying one of said beams and the outer end of the wooden horn overlying the other of said beams, and elastic vibration insulators between said beams and said block and wooden horn, whereby the sound amplifier i hold in floating relation to the (cabinet, thereby minimizing transmission to the radio outfit of vibrations produced by the passage of sound waves through the amphfier,

in testimony of which hereunto set my ha d Penns lvania on this invention. I have Phi lelnhizn 

